Probably not, but rather than respond directly to the email, access your account by the usual method, and change your password there.
Adobe has been asking everyone to change their password due to a hack, but as Trevor said, always go to the actual site to change a password, and never though an email link.
Chances are it was legitimate, but take Trevor's and Chuck's advice to be sure.
See also the following page (noting especially the bulleted paragraphs):
I agree with the appends here.
I changed my Password before I got Adobe's mail. I changed it when I read Adobe Site had been hacked. I still find it upsetting that Adobe waited six or seven weeks to inform us of that fact and I did not get mail from Adobe until four days after the Adobe blog announcement.
Always change you password by going to the the web sites yourself do not follow any link in any unsolicited e-mail you may get. If you requested password reset e-mail you may need to follow a link..
Hey, I didn't realize the timing was so long JJ. Sounds almost like spin after the blog post outed the hack.